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Giménez-Pérez G, Gallach M, Acera E, Prieto A, Carro O, Ortega E, González-Clemente JM, Mauricio D.Giménez-Pérez G, et al.J Med Internet Res. 2002 Dec;4(3):E16. doi: 10.2196/jmir.4.3.e16.J Med Internet Res. 2002.PMID: 12554547Free PMC article.